抄録
The first object of this paper is to modify the method, which was proposed by authors in the previous papery, for determination of parameters of pile bearing capacity formula based on statistical analysis. Accordingly, a new method for estimation of skin friction of steel pipe piles driven into clay layers is proposed based on equation (1). The second object is to show the accuracy of the method. The results of statistical analysis with 68 in-situ loading tests which have been gathered and used in the previous paper are equal to the results of those with 112 tests which are gathered the present paper. Hence, it is seen that the reliability of the statistical analysis by using the data from a sample population of 68 in-situ loading tests is adequate. The new formula is compared with those estimated by the methods currently used in Japan and the engineering usefulness of the new method is emphasized.
